RBAC tables

Are the RBAC tables the same for Yii 2 as they where in Yii 1?

I am speaking in terms of the SQL used to generate them etc.

No, they are not. There is a new rule table in Yii 2 and some other minor changes. The default names are different for tables, although these can be configured. The column names follow a different convention but the basic layout follows the same idea: VARCHAR(64) fields for auth item names etc.

Schema 1.1: https://github.com/yiisoft/yii/blob/master/framework/web/auth/schema-mysql.sql

Schema 2.0: https://github.com/yiisoft/yii2/blob/master/framework/rbac/migrations/schema-mysql.sql

The tables for RBAC are included in the default migrations.